Darwinian selection

例句：

1. 1. In theprocess of natural selection, species evolve to adapt to their environment.
   在自然选择的过程中，物种进化以适应环境。
2. 2.The theory of natural selection is a cornerstone of modern biology.
   自然选择的理论是现代生物学的基石。
3. 3. The survival of the fittest is a fundamental principle of Darwinian selection.
   适者生存是达尔文选择原理的基本原则。